
Tensor decomposition: in which we decompose the tensorial structure of the amplitude in terms of a linear combination of independent Lorentz vectors and Tensor, multiplied by some coefficients known as form factors.

Reduction to Master Integrals (MI): in which we will use the powerful identities relating the different Feynman integrals, such as the integration-by-parts (IBP) identities [1]}, [2]}, to decompose the form factors in a basis of integrals, which are the Master Integrals.

Master Integral evaluation: in which we will evaluate the Master Integrals appearing. This procedure can be done directly or using other methods such as difference [3]}, [4]} or differential equations (DEs) [5]}, [6]} (for reviews see [7]}, [8]}).

